Fritz chaos circuit

chriswilliams · Posted: Wed Jan 02, 2008 10:59 pm Post subject:

Hehe yeah its nice innit? A/C and watching cricket on TV is a good antidote Very Happy

loss1234 · Posted: Thu Jan 03, 2008 8:42 am Post subject: hmmm

ok, wired up the changes and am ready to go BUT how do i ground a passive circuit? I made a little volume pot box, with a 100k pot and an input and an output. BUT WHERE DO I CONNECT THE GROUNDS of the jacks? if there is no battery or anything? do i connect them to the chassis? (its a plastic box!)

thanks

loss1234 · Posted: Thu Jan 03, 2008 9:42 am Post subject:

ok
for now i am just using an old vca i had built in a plastic box for a volume control.

this circuit is capable of a lot of different sounds but i am not so sure how many of them are chaotic sounds. could someone do me a favor and post a very basic sample of the fritz ez chaos module creating chaos??

if i knew what this circuit is supposed to sound like, i could shoot for that.

i will say though, this circuit is very inspiring. I even got some neat sounds by having the drive vco going into one of the INPUTS by mistake!

endless inspiration.

i'd love to understand how it works.

thanks all

para · Joined: Oct 16, 2006 Posts: 276

ground it to the ground of your supply.

steven

bugfight · Joined: Aug 02, 2007 Posts: 188 Location: Arlington, TX USA

loss1234 · Posted: Thu Jan 03, 2008 10:21 am Post subject:

i couldnt find any clips on his site of JUST the ez chaos circuit. there is one on there where it is combined with a different circuit but i want to hear it on its own (but if they are on there i would love to hear it)

PARA-as far as grounding it to my supply, i made it a separate box. I'd like to have this be a passive volume control i can use with other synths,etc.

so do i always have to ground things to a power supply? arent there some passive circuits that are totally passive and use no power supply?

thanks

[/left]

bugfight · Joined: Aug 02, 2007 Posts: 188 Location: Arlington, TX USA

para · Joined: Oct 16, 2006 Posts: 276

are you using banana, 3.5mm or 1/4"? if its 3.5mm or 1/4" then just ground to the sleeve of the jacks and your are fine.

if banana then you will have to run another to the ground of the supply of whatever you are feeding it

sorry to drag this off topic i just don't you to destroy anything

you will find one of Ian's samples here : http://home.comcast.net/~ijfritz/ch_over.htm

direct link : http://home.comcast.net/~ijfritz/spiralchaos1.mp3

steven

loss1234 · Posted: Thu Jan 03, 2008 10:50 am Post subject:

no i mean i want a clip where all he is using is the ez chaos to control maybe a vco. i understand that this is a cv module but i think the clip on his site is in conjuction with his sample and hold circuit chaos module.

loss1234 · Posted: Thu Jan 03, 2008 10:54 am Post subject:

quite a clip!!!

so just wire each jack to each others sleeve?

i havent actually tried playing any notes yet on the vco being controlled by the chaos module. just a constant tone. but even that sounds really cool with the cvs coming in.

i'd love to hear more of how other peoples experiments went with the ez chaos.

is it natural for it to sound like an lfo sometimes? its seems like there are areas where you can feel that it is going to get more "random" or dynamic sounding and then other areas of the knobs it goes more into an lfo mode where it is just oscillating in a repetitive (although useful) way.

para · Joined: Oct 16, 2006 Posts: 276

"so just wire each jack to each others sleeve? " yep and then ground the pot to the sleeves as well.

http://thesquarewaveparade.com/images/tutor/volpot.jpg

steven

frijitz · Posted: Thu Jan 03, 2008 12:12 pm Post subject:

loss1234 · Posted: Thu Jan 03, 2008 2:22 pm Post subject:

para-thanks i will get that wired up

fritz-

i will tell you this much, even if its not working, i love it!!
in all seriousness i am pretty sure that i can hear regions where there is a tendency toward random/dynamic behavior and regions where it sounds like a very unique mod source/lfo.

i also just finished reading that article on chaos in music posted here earlier by andrew f and that gave me some ideas as well. this seems to be the most exciting area in music for me right now and one i will certainly be messing with for a long time if i can make the circuits without screwing them up Smile

there is also someone who has made a low frequency chaos oscillator ( http://home.earthlink.net/~erinys/LFCO_schematic.jpg

based on someone named sprotts work and i was wondering how similar or differernt that might be.

oh if only i could understand math enough to really dive into this stuff Sad

thanks so much fritz for providing these circuits!!

frijitz · Posted: Thu Jan 03, 2008 2:50 pm Post subject: demo

Here is a simple demo clip of the EZChaos circuit. The circuit's "X" output is driving the FM input of a Saw VCO. The signal from this VCO is the recorded audio. The circuit's "Drive" input is fed from a second, low frequency, VCO. The low frequency VCO is swept slowly down then back up in frequency through the clip. The "Drive" and "Damp" controls are near midpoint.

Refer to the scope shots here to see what you are listening to.
http://home.comcast.net/~ijfritz/ch_cir1.htm
The system is being swept through conditions corresponding to the first two photos. At the beginning, the system is in the right-hand well (higher pitch). As the sweep progresses the signal becomes jittery and has a wider pitch range, as indicated by the photo on the left. As the sweep progresses the system begins jumping between the two wells, producing high and low pitch ranges. This corresponds to the second photo. At the lowest part of the sweep the system is periodic for a few cycles before the sweep turns around and retraces the pattern changes. Note that the system ends up in the left-hand well (lower pitch). This is because the system is "bistable" and can be in either well.

Hope this helps!

Very Happy

Ian

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frijitz · Posted: Thu Jan 03, 2008 3:04 pm Post subject:

frijitz · Posted: Fri Jan 04, 2008 10:20 am Post subject: another demo

Here's a second demo of the EZChaos circuit. The setup is similar to the first: the "Drive" input is fed a slowly swept low frequency signal. The circuit's "X" output goes to the FM in of a VCO. The VCO out goes to a VCF, which is FM'ed from the chaos "Y" signal. The "Rate" control is set all the way up, and the drive is swept through the entire range of signals that can be produced. (For one fixed drive level and damping amount).

You will notice that chaotic behavior only occurs in several (5) limited regions. But the limit cycles in the other regions are also interesting.

Very Happy

Ian

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loss1234 · Posted: Fri Jan 04, 2008 12:10 pm Post subject:

do you think i am getting different results because i am NOT USING a swept signal? i am just using a constant tone which doesnt change as the input into drive. (is that the point of USING an lfo here? that its so slow that it sweeps up and down?)

i like your examples!

i will have to post some of what i am getting out of it. strange stuff for sure. i know that today i was getting the strangest rhythms out of it. in odd time signatures. in other words, an lfo usually beats as a 4/4. but what i was getting WAS repeating but it was such odd material that was repeating. very cool for sampling and looping.

frijitz · Posted: Fri Jan 04, 2008 1:00 pm Post subject:

loss1234 · Posted: Fri Jan 04, 2008 1:13 pm Post subject:

still not clear on how a swept tone would differ from a constant tone.
when you put an INPUT into this circuit, is that INPUT changing frequency or remaining constant?

I understand how to set the knobs based on what you have told me but i am still not sure if i should be trying to input something that changes or remains constant to achieve chaos.

thanks for being so patient. this really is getting some great sounds though.

for me i think it is going to be a go-to sort of module!

frijitz · Posted: Fri Jan 04, 2008 1:37 pm Post subject:

bugfight · Joined: Aug 02, 2007 Posts: 188 Location: Arlington, TX USA

frijitz · Posted: Fri Jan 04, 2008 3:06 pm Post subject: Re: another demo

bugfight · Joined: Aug 02, 2007 Posts: 188 Location: Arlington, TX USA

loss1234 · Posted: Fri Jan 04, 2008 6:32 pm Post subject:

no fritz i dont think you did understand my question but thats ok. I was well aware that i needed to find the right positions for the 4 pots. that wasnt my question at all. What i was asking was whether i would be better off INPUTTING a constant tone or a sweeping tone. My question wasnt about any knob ON the circuit itself but what i was PUTTING into the input.

in other words, what works best for an input. a saw? a sine. or a sweeping tone?

does that make sense?

its not really a big deal and i have over three hours worth of awesome recordings with this thing already so its not like its not working. i was just trying to get some additional info on what you INJECT into the circuit.

sorry to have frustrated you.

Smile

i am going to try hooking up two of these this week!!!

blue hell · Posted: Fri Jan 04, 2008 7:01 pm Post subject: